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Red Hat Enterprise Linux 6.6 Beta

6.6 Release Notes

Release Notes for Red Hat Enterprise Linux 6.6 Beta
Edition 6

Red Hat Enterprise Linux 6.6 Beta 6.6 Release Notes

Release Notes for Red Hat Enterprise Linux 6.6 Beta
Edition 6

Red Hat Custo mer Co ntent Services

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Abstract

The Release No tes pro vide high-level co verage o f the impro vements and additio ns that have
been implemented in Red Hat Enterprise Linux 6 .6 Beta. Fo r detailed do cumentatio n o n all
changes to Red Hat Enterprise Linux fo r the 6 .6 Beta update, refer to the Technical No tes.

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Table of Contents

Preface

⁠Chapt er 1 . Kernel

⁠Enhanced SCSI Unit Attentio n Hand ling
⁠O p en vSwitch Kernel Mo d ule

⁠Chapt er 2 . Net working

⁠Chang es to HPN Ad d -O n

⁠Chapt er 3. Securit y

⁠SCAP Security G uid e

⁠Chapt er 4 . Virt ualizat ion

⁠New Packag es: hyp erv-d aemo ns

⁠Chapt er 5. St orage

⁠Enhancements to d evice-map p er Sto rag e Area

⁠d m-era Techno lo g y Preview

⁠Chapt er 6 . Hardware Enablement

⁠Sup p o rt fo r Intel Wild cat Po int-LP PCH
⁠Sup p o rt fo r VIA VX9 0 0 Med ia System Pro cesso r

⁠Chapt er 7 . Indust ry St andards and Cert ificat ion

⁠Fip s 140 Revalid atio ns

⁠Chapt er 8 . Aut hent icat ion and Int eroperabilit y

⁠Better Intero p erab ility with Active Directo ry
⁠Ap ache Mo d ules fo r IPA

⁠Chapt er 9 . Deskt op and G raphics

⁠New Packag e: g d k-p ixb uf2

⁠Chapt er 1 0 . Performance and Scalabilit y

⁠Perfo rmance Co -Pilo t (PCP)

Component Versions

Revision Hist ory

2

3
3
3

4

4

5
5

6
6

7

7
7

8
8
8

9
9

1 0

10
10

1 1

11

1 2

12

1 3

1 4

T able of Cont ent s

1

Preface

Red Hat Enterprise Linux minor releases are an aggregation of individual enhancement, security and
bug fix errata. The Red Hat Enterprise Linux 6.6 Beta Release Notes documents the major changes
made to the Red Hat Enterprise Linux 6 operating system and its accompanying applications for this
minor release. Detailed notes on changes (that is, bugs fixed, enhancements added, and known
issues found) in this minor release are available in the

Technical Notes

. The Technical Notes

document also contains a complete list of all currently available Technology Previews along with
packages that provide them.

Important

The online Red Hat Enterprise Linux 6.6 Beta Release Notes, which are located online

here

, are to

be considered the definitive, up-to-date version. Customers with questions about the release
are advised to consult the online Release and Technical Notes for their version of Red Hat
Enterprise Linux.

Should you require information regarding the Red Hat Enterprise Linux life cycle, refer to

https://access.redhat.com/support/policy/updates/errata/

.

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

2

Chapter 1. Kernel

Enhanced SCSI Unit At t ent ion Handling

The kernel in Red Hat Enterprise Linux 6.6 Beta has been enhanced to enable user space to respond
to certain SCSI Unit Attention conditions received from SCSI devices via the udev event mechanism.
The supported Unit Attention conditions are:

3F 03 INQUIRY DATA HAS CHANGED

2A 09 CAPACITY DATA HAS CHANGED

38 07 THIN PROVISIONING SOFT THRESHOLD REACHED

2A 01 MODE PARAMETERS CHANGED

3F 0E REPORTED LUNS DATA HAS CHANGED

The default udev rules for the supported Unit Attention conditions are provided by the libstoragemgmt
RPM package. The udev rules are located in the /l i b/ud ev/rul es. d /9 0 -scsi -ua. rul es file.

The default rules handle the R EP O R T ED LUNS D AT A HAS C HANG ED unit attention. Additional
example rules are present to enumerate the other events that the kernel can generate. Note that the
default rules do n o t automatically remove logical unit numbers (LUNs) that are no longer present on
the SCSI target.

Because SCSI Unit Attention conditions are only reported in response to a SCSI command, no
conditions are reported if no commands are actively being sent to the SCSI device.

The default behavior can be customized by modifying or removing the udev rules. If the
libstoragemgmt RPM package is not installed, the default rules are not present. If no udev rules are
present for those events, no action is taken, but the events themselves are still generated by the
kernel.

Open vSwit ch Kernel Module

Red Hat Enterprise Linux 6.6 Beta includes the Open vSwitch kernel module as an enabler for Red
Hat's layered product offerings. Open vSwitch is supported only in conjunction with products that
contain the accompanying user-space utilities. Please note that without these required user-space
utilities, Open vSwitch will not function and can not be enabled for use. For more information, please
refer to the following Knowledge Base article:

https://access.redhat.com/knowledge/articles/270223

.

⁠Chapt er 1 . Kernel

3

Chapter 2. Networking

Changes t o HPN Add-On

Starting with Red Hat Enterprise Linux 6.6 Beta, the High Performance Networking (HPN) Add

​On is

no longer be available as a separately available product. Instead, the functionality found in the HPN
Add-On has been integrated into the base product and delivered as part of the Red Hat
Enterprise Linux base channel.

In addition to including the HPN functionality into the base Red Hat Enterprise Linux 6 product, the
RDMA over Converged Ethernet (RoCE) implementation has also been updated. RoCE uses Global
Identifier or GID-based addressing for node

​to-node communication. Previously, GIDs were encoded

based on the Ethernet interface's MAC address along with the VLAN ID (if used). In certain instances
where the compute entity that runs the RoCE protocol may not be aware that its traffic is VLAN-tagged,
the compute entity can create or assume a wrong GID, resulting in connectivity problems. The
updated RoCE implementation resolves this problem by changing how the RoCE GIDs are encoded
and instead bases them off the IP addresses of the Ethernet interface. All systems utilizing the RoCE
protocol need to be upgraded Red Hat Enterprise Linux 6.6 to ensure connection reliability due to
this change in the wire protocol format.

Please refer to this Red Hat Knowledge Base article for additional information:

https://access.redhat.com/site/articles/971333

.

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

4

Chapter 3. Security

SCAP Securit y Guide

The scap-security-guide package has been included in Red Hat Enterprise Linux 6.6 Beta to provide
security guidance, baselines, and associated validation mechanisms that use Security Content
Automation Protocol (SCAP). SC AP Securi ty G ui d e contains the necessary data to perform
system security compliance scans regarding prescribed security policy requirements; both a written
description and an automated test (probe) are included. By automating the testing, SC AP Securi ty
G ui d e provides a convenient and reliable way to verify system compliance on a regular basis.

⁠Chapt er 3. Securit y

5

Chapter 4. Virtualization

New Packages: hyperv-daemons

New hyperv-daemons packages have been added to Red Hat Enterprise Linux 6.6 Beta. The new
packages include the Hyper-V KVP daemon, previously provided by the hypervkvpd package, and
Hyper-V VSS daemon, previously provided by the hypervvssd package. The suite of daemons
provided by hyperv-daemons are needed when a Linux guest is running on a Microsoft Windows host
with Hyp er- V.

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

6

Chapter 5. Storage

Enhancement s t o device-mapper St orage Area

Several significant enhancements in the Red Hat Enterprise Linux block layer storage area have
been introduced, including the addition of the d m-cache device mapper target, which allows fast
storage devices to act as a cache for slower storage devices. Also, the device mapper multipath
usability has been improved.

dm -e ra T e chno lo gy Pre vie w

The device-mapper-persistent-data package now provides tools to help use the new d m-era device
mapper functionality released as a Technology Preview. The d m-era functionality keeps track of
which blocks on a device were written within user-defined periods of time called. This functionality
allows backup software to track changed blocks or restore the coherency of a cache after reverting
changes. ,

⁠Chapt er 5. St orage

7

Chapter 6. Hardware Enablement

Support for Int el Wildcat Point -LP PCH

Broadwell-U PCH SATA, HD Audio, TCO Watchdog, and I2C (SMBus) device IDs have been added
for the drivers, which enables support for Intel Wildcat Point-LP PCH controllers in Red Hat
Enterprise Linux 6.6 Beta.

Support for VIA VX900 Media Syst em Processor

VIA VX900 Media System Processor is supported in Red Hat Enterprise Linux 6.6 Beta.

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

8

Chapter 7. Industry Standards and Certification

Fips 14 0 Revalidat ions

Federal Information Processing Standards Publications (FIPS) 140 is a U.S. government security
standard that specifies the security requirements that must be satisfied by a cryptographic module
utilized within a security system protecting sensitive, but unclassified information. The standard
provides four increasing, qualitative levels of security: Level 1, Level 2, Level 3, and Level 4. These
levels are intended to cover the wide range of potential applications and environments in which
cryptographic modules may be employed. The security requirements cover areas related to the
secure design and implementation of a cryptographic module. These areas include cryptographic
module specification, cryptographic module ports and interfaces; roles, services, and authentication;
finite state model; physical security; operational environment; cryptographic key management;
electromagnetic interference/electromagnetic compatibility (EMI/EMC); self-tests; design assurance;
and mitigation of other attacks.

The following targets have been fully validated:

NSS FIPS-140 Level 1

Suite B Elliptic Curve Cryptography (ECC)

The following targets have been revalidated:

OpenSSH (Client and Server)

Openswan

dm-crypt

OpenSSL

Suite B Elliptic Curve Cryptography (ECC)

Kernel Crypto API

AES-GCM, AES-CTS, and AES-CTR ciphers

⁠Chapt er 7 . Indust ry St andards and Cert ificat ion

9

Chapter 8. Authentication and Interoperability

Bet t er Int eroperabilit y wit h Act ive Direct ory

Added functionality of SSSD enables better interoperability of Red Hat Enterprise Linux clients with
Active Directory, which makes identity management easier in a Linux and Windows environment.

Apache Modules for IPA

A set of Apache modules has been added to Red Hat Enterprise Linux 6.6 Beta as a Technology
Preview. The Apache modules can be used by external applications to achieve tighter interaction
with Identity Management beyond simple authentication.

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

10

Chapter 9. Desktop and Graphics

New Package: gdk-pixbuf2

The gdk-pixbuf2 package, previously a part of the gtk2 package, has been added to Red Hat
Enterprise Linux 6.6 Beta. The gdk-pixbuf2 package contains an image-loading library that can be
extended by loadable modules for new image formats. The library is used by toolkits such as GTK+
or Clutter. Note that downgrading the libraries included in the gdk-pixbuf2 and gtk2 packages can fail.

⁠Chapt er 9 . Deskt op and G raphics

11

Chapter 10. Performance and Scalability

Performance Co-Pilot (PCP)

Performance Co-Pilot (PCP) has been introduced in Red Hat Enterprise Linux 6.6 Beta as a
Technology Preview. PCP provides a framework and services to support system-level performance
monitoring and management. Its light-weight, distributed architecture makes it particularly well-suited
to centralized analysis of complex systems.

Performance metrics can be added using the Python, Perl, C++ and C interfaces. Analysis tools can
use the client APIs (Python, C++, C) directly, and rich web applications can explore all available
performance data using a JSON interface.

For further information, consult the extensive man pages in the pcp and pcp-libs-devel packages. The
pcp-doc package installs documentation in the /usr/share/d o c/pcp-d o c/* directory, which also
includes these two free and open books from the upstream project:

http://performancecopilot.org/doc/pcp-users-and-administrators-guide.pdf

http://performancecopilot.org/doc//pcp-programmers-guide.pdf

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

12

Component Versions

This appendix is a list of components and their versions in the Red Hat Enterprise Linux 6.6 Beta
release.

T ab le A.1. Co mp o n en t Versio n s

Co mp o n en t

Versio n

Kernel

2.6.32-494

QLogic q l a2xxx driver

8.07.00.08.06.6-k

QLogic ql2xxx firmware

ql23xx-firmware-3.03.27-3.1

ql2100-firmware-1.19.38-3.1

ql2200-firmware-2.02.08-3.1

ql2400-firmware-7.03.00-1

ql2500-firmware-7.03.00-1

Emulex l pfc driver

10.2.8020.1

iSCSI initiator utils

iscsi-initiator-utils-6.2.0.873-11

DM-Multipath

device-mapper-multipath-libs-0.4.9-80

LVM

lvm2-2.02.108-1

Component Versions

13

Revision History

Revisio n 0.0- 0.2

T u e Au g 12 2014

Milan Navrát il

Release of the Red Hat Enterprise Linux 6.6 Beta Release Notes.

Red Hat Ent erprise Linux 6 .6 Bet a 6 .6 Release Not es

14